By Lennert Buytenhek Adds support for arm*b-linux* big-endian ARM targets See http://gcc.gnu.org/PR16350 --- a/gcc/config/arm/linux-elf.h +++ b/gcc/config/arm/linux-elf.h @@ -28,19 +28,33 @@ #undef TARGET_VERSION #define TARGET_VERSION fputs (" (ARM GNU/Linux with ELF)", stderr); +/* + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-* + * (big endian) configurations. + */ +#if TARGET_BIG_ENDIAN_DEFAULT +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END +#define TARGET_ENDIAN_OPTION "mbig-endian" +#define TARGET_LINKER_EMULATION "armelfb_linux" +#else +#define TARGET_ENDIAN_DEFAULT 0 +#define TARGET_ENDIAN_OPTION "mlittle-endian" +#define TARGET_LINKER_EMULATION "armelf_linux" +#endif + #undef TARGET_DEFAULT_FLOAT_ABI #define TARGET_DEFAULT_FLOAT_ABI ARM_FLOAT_ABI_HARD #undef TARGET_DEFAULT -#define TARGET_DEFAULT (0) +#define TARGET_DEFAULT (TARGET_ENDIAN_DEFAULT) #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm6 -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux -p" +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION " -p" #undef MULTILIB_DEFAULTS #define MULTILIB_DEFAULTS \ - { "marm", "mlittle-endian", "mhard-float", "mno-thumb-interwork" } + { "marm", TARGET_ENDIAN_OPTION, "mhard-float", "mno-thumb-interwork" } /* Now we define the strings used to build the spec file. */ #undef LIB_SPEC @@ -65,7 +79,7 @@ %{rdynamic:-export-dynamic} \ %{!dynamic-linker:-dynamic-linker " LINUX_TARGET_INTERPRETER "} \ -X \ - %{mbig-endian:-EB}" \ + %{mbig-endian:-EB} %{mlittle-endian:-EL}" \ SUBTARGET_EXTRA_LINK_SPEC #undef LINK_SPEC --- a/gcc/config.gcc +++ b/gcc/config.gcc @@ -672,6 +672,11 @@ arm*-*-netbsd*) ;; arm*-*-linux*) # ARM GNU/Linux with ELF tm_file="dbxelf.h elfos.h linux.h arm/elf.h arm/linux-gas.h arm/linux-elf.h" + case $target in + arm*b-*) + tm_defines="${tm_defines} TARGET_BIG_ENDIAN_DEFAULT=1" + ;; + esac tmake_file="${tmake_file} t-linux arm/t-arm" case ${target} in arm*-*-linux-gnueabi | arm*-*-linux-uclibcgnueabi) --- a/gcc/config/arm/linux-eabi.h +++ b/gcc/config/arm/linux-eabi.h @@ -20,6 +20,17 @@ the Free Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ +/* + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-* + * (big endian) configurations. + */ +#undef TARGET_LINKER_EMULATION +#if TARGET_BIG_ENDIAN_DEFAULT +#define TARGET_LINKER_EMULATION "armelfb_linux_eabi" +#else +#define TARGET_LINKER_EMULATION "armelf_linux_eabi" +#endif + /* On EABI GNU/Linux, we want both the BPABI builtins and the GNU/Linux builtins. */ #undef TARGET_OS_CPP_BUILTINS @@ -48,7 +59,7 @@ #define SUBTARGET_CPU_DEFAULT TARGET_CPU_arm10tdmi #undef SUBTARGET_EXTRA_LINK_SPEC -#define SUBTARGET_EXTRA_LINK_SPEC " -m armelf_linux_eabi" +#define SUBTARGET_EXTRA_LINK_SPEC " -m " TARGET_LINKER_EMULATION /* Use ld-linux.so.3 so that it will be possible to run "classic" GNU/Linux binaries on an EABI system. */ --- a/gcc/config/arm/bpabi.h +++ b/gcc/config/arm/bpabi.h @@ -33,9 +33,19 @@ #undef FPUTYPE_DEFAULT #define FPUTYPE_DEFAULT FPUTYPE_VFP +/* + * 'config.gcc' defines TARGET_BIG_ENDIAN_DEFAULT as 1 for arm*b-* + * (big endian) configurations. + */ +#if TARGET_BIG_ENDIAN_DEFAULT +#define TARGET_ENDIAN_DEFAULT MASK_BIG_END +#else +#define TARGET_ENDIAN_DEFAULT 0 +#endif + /* EABI targets should enable interworking by default. */ #undef TARGET_DEFAULT -#define TARGET_DEFAULT MASK_INTERWORK +#define TARGET_DEFAULT (MASK_INTERWORK | TARGET_ENDIAN_DEFAULT) /* The ARM BPABI functions return a boolean; they use no special calling convention. */